This is the simple way to root Samsung J120F and unlock with z3x box.
Here is some simple steps to Root J120F.100% tested..........
- Complete power on mobile
- Open google chrome or any other browser then download Kingo Root.apk and install it
- Open Kingo Root and tap just root option wait some second or minute until Root complete.
- Download Root checker form Play store and open it then tap Verify Root Status.You can see congratulation!Root access is properly installed on this device.
- Now your device rooted and ready to unlock
- Open z3x box pro tool v24.7 or latest search j120f and click it and choose Unlock option.
- Connect mobile with usb cable.Go to setting>developer options> then just on OEM unlock and USB debugging.
- Now click on Read code option on z3x pro tool(don't run unlock option because it is not work properly )
- Now you can see net lock code.Then restart your mobile and just put code then press unlock.You can see unlock successfully.